runtime(typst): Add typst runtime files

closes: #15234

Signed-off-by: Gregory Anders <greg@gpanders.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/typst.vim b/runtime/ftplugin/typst.vim
index c2d7811..fba8083 100644
--- a/runtime/ftplugin/typst.vim
+++ b/runtime/ftplugin/typst.vim
@@ -1,14 +1,24 @@
-" Vim filetype plugin
-" Language:	typst
-" Maintainer:	Riley Bruins <ribru17@gmail.com>
-" Last Change:	2024 May 19
+" Vim filetype plugin file
+" Language:    Typst
+" Maintainer:  Gregory Anders
+" Last Change: 2024-07-14
+" Based on:    https://github.com/kaarmu/typst.vim
 
 if exists('b:did_ftplugin')
   finish
 endif
 let b:did_ftplugin = 1
 
-setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
-setlocal commentstring=//\ %s
+compiler typst
 
-let b:undo_ftplugin = 'setl com< cms<'
+setlocal commentstring=//\ %s
+setlocal comments=s1:/*,mb:*,ex:*/,://
+setlocal formatoptions+=croq
+setlocal suffixesadd=.typ
+
+let b:undo_ftplugin = 'setl cms< com< fo< sua<'
+
+if get(g:, 'typst_conceal', 0)
+  setlocal conceallevel=2
+  let b:undo_ftplugin .= ' cole<'
+endif